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(No Model.) 2 Sheets-Sheet 1.

R. DOWSON & J. TAYLOR.

CHEMICAL FIRE EXTINGUISHBR. 7 No; 323,859. Patented Aug. 4, 1885.

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(No Model.)

ZSheets-Sheet 2.

R. DOWSON & J. TAYLOR, CHEMICAL FIRE EXTINGUISHER.

' No. 323,859, Patented Aug..4, 1885.

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UNiTEn STATES ATENT v Enron.

RALPH DOWSON AND JOHN TAYLOR, OF BOLTON, COUNTY OF LANCASTER, ENGLAND.

CHEMICAL FIRE-EXTINGUISHER.

SPECIFICATION forming part of Letters Patent No. 323,859, dated August 4, 1885.

Application filed March 19, 1885. (No model.) Patented in England January 21, 1884, No. 1,813.

To all whom it may concern:

Be it known that we, RALPH DoWsoN and JoI-IN TAYLOR, of the firm of DowsoN & TAYLOR, 71 Knowsley Street, Bolton, in the county of Lancaster, England, fire engineers, have invented new and useful Improvements in Apparatus for Extinguishing Fire, for which we have obtained a patent in Great Britain, No. 1,813, January 21, 1884, of which the fol- 1o lowingis aspecitication.

Our invention relates to improvements in that class of fire-extinguishin g apparatus known as a chemical fire-engine, or what is better known by the name of extinguisher,

in which a vessel is provided containing an alkaline solution and a bottle containing acid, together with convenient means for effectively and readily breaking the said bottle, so as to mix the alkaline solution and acid when the apparatus is required to be used, causing earbonic-acid gas and liquid to be projected on the fire, with increased facilities for charging and rechargingthe same when requisite or necessary. Figure 1 is a sectional elevation of a chemical fire engine or extinguisher with our improvements applied. Fig. 2 is a plan looking on the top side; Fig. 3, a plan showing the swiveling cap open for the purpose of charging the extinguisher, with the funnel or tundish removed. Fig. 4. is an outside elevation of the nozzle, showing the side on which the swiveling cap operates; Fig. 5, the opposite side to Fig. 4, and Fig. 6 is an enlarged View of the swiveling cap and joint-ring.

The case A of the extinguisher is made .of suitable metallic materials-such as sheetcopper and tinned iron-the top side being made in the form of a dome, as shown, or in any other convenient form, as desired. On the top of the dome is placed the metallic nozzle B, provided with the perforated projecting cavity chamber 0, extending downward inside the casing A of the extinguisher, in which the selt adjusti n g bottle D, containing the acid, is placed, being held or supported on the circular projection E at the bottom of the cavitychamber 0. The nozzle B,extending upward from the top of the extinguisher, is provided with the notched or lipped cavity or recess for receiving the india-rubber joint ring or valve F, which is for the purpose of forming an airtight joint when the swiveling cap or cover G is placedin position over it, as shown in Figs. 1 and 2. The cap G is secured to the nozzle B by the bolt or set-screw H to the flange or projection I on the outer flange of the said nozzle. For the purpose of firmly securing the swiveling cap or cover Gr when shut, as in Figs. 1 and 2, the nozzle is provided with the or angular piece or projection J, under which the cap or cover Gr slides, the pressure on the cap or cover G and india-rubber ring or valve F being nil until such times the self-adjusting bottleis broken and gas and pressure generated, when the overhanging internal lip on the indiarubber ring or valve F is pressed tightly by the pressure generated against the under side of the cap or cover Gr, thereby making a perfectly-tightjoint. For the purpose of opening and closing the swiveling or sliding cap or cover G it is provided with the handle K. Thus, when it is desired to open the extinguisher for the purpose of inserting a charge, or otherwise, the cap or cover G is swiveled or slid sidewise, as shown in Fig. 3.

To facilitate the charging of the extinguisher with water or solution, the bell mouthed tunnel or tun-dish L is provided, being supported with the circular flange M, the latter being made sufficiently strong to dispense with supports from the side of the nozzle on which the cap or cover G swivels, being secured and supported on the opposite side to the top end of the nozzle B by the bracket N and angular projection J.

To insure safety and protect the swiveling cap or cover G from flying open when in use or otherwise, the side of the nozzle is provided with the lipped spring a, which acts on the pin 1), fastened to the under side of the handle K, as shown in Fig. 2. When it is desired to open the nozzle of the extinguisher, it is effected by simply pressing the spring a 5 inwardly until the lipped point 0 liberates the pin b, when the cap or cover G can be opened, as in Fig. 3. The outer end of the spring a is so constructed that when the cap or cover is closed it yields and allows the pin 1) to pass the point 0. When it is shut perfectly, the spring locks it in position, from which it can only be liberated as stated.

To prevent the self-adjusting bottle D being broken when dropped into the cavity-chamber O, the under side of the head 0 is provided with a groove, in which the india-rubbcr ring 1 is inserted.

After the adjusting-bottle D is broken and the contents of the extinguisher discharged, it is necessary the fragments should be emptied. To insure this the perforated metallic bellmouthed dish R is provided, being secured. to the case A and the under side of the nozzle by convenient means, by which, when the extinguisher is inverted, the broken glass or fra gm cnts will slide out. The form of this dish is necessary owing to the projecting nozzle, without which it would be difficult to remove the fragments. The dish R and cavity G are perforated to allow the full force of the pressure in the extinguisher to act on the indiarubber ring or valve F.

For the purpose of facilitating the breaking of the selfadjusting bottle D, containing the acid, the case A of the extinguisher is pro vided with the bossf, stuftingbox (I, and gland e, in which is placed the swiveling or revolving spindle g, to which is secured, by casting or otherwise, the swiveling or revolving arm It and hammer or mallet t. On the end of the spindle 9, outside the extinguisher and stuffing-box, the handlej is placed, by which the swiveling or revolving arm hand hammer t are operated to break the self-adjusting bottle 1) when necessary, which is effected by simply turning the handle j sidewise or completely round, and which is such a simple action that it is competent for any person to use it.

To enable the extinguisher to be emptied of its liquid contents, or nearly so, as well as to prevent anything entering the outlet-tap S that would tend to obstruct the passage through it, the bent pipe and perforated nozzle T are provided, descending to the bottom, or nearly so, of the extinguisher-case A, as shown in Fig. 1.

For the purpose of carrying the extinguisher, the handles lY are provided, being also furnished with the necessary straps (not shown) for saddling it on the operators back, if necessary.

The advantages of our invention are that it is self-contained, dispensing with the use of screw-keys, mallets, or any other loose parts extinguisher is again ready for immediate use,

the appliances for operating it being self-contained, and which can be used by the opera tor at will.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. The combination,in a fire-extinguisher, of the nozzle B, having cavity-chamber(J, the swiveling or sliding cap or cover G, and the india rubber ring or valve F, substantially as described.

2. The combinatiomin a tire extinguisher, of the nozzle B, having cavity-chamber G, the cap or cover G, pivoted to said nozzle, the india-rubber ring or valve F, and the projection J on the upper part of the nozzle, under whichthe cover G slides and is held against upward pressure, substantially as described.

3. In a tire-extinguisher, the combination, with the nizzle B, having cavity-chamber (l, and the pivoted or swiveled cap or cover Gr, ofthe springer, secured to the nozzle B,havin g the lipped point 0 and the pin 1) secured to an extension or handlc,lc, of the cover G, whereby said cover is held securely in place by the pin 11 engaging with the points of spring a, substantially as described.

4. In a tire-extinguisher, the combination, with the acid-bottle D, having a recess or cavity, and an india-rubber ring, 1, tittin g therein, forming a cushion to prevent accidental breakage of the bottle when inserted in the nozzle, of the nozzle B, having cavity-chamber 0, provided with annular projection E, to receive and hold the bottle in position, substantially as described.

The foregoing specification of our improvements in apparatus for extinguishing fire signed by us this 4th day of February, 1885.

RALPH DOWSON. 7 JOHN TAYLOR. Witnesses:

W. A. Gnnusimw, E. CHADWICK. 

